More on functions chapter examples and exerxises

Author: ChronicleGremlin

more-on-functions/chapter-examples/anonymous-functions/userInput-is-negative.js

@@ -4,7 +4,7 @@ let logger = function(errorMsg) {
   console.log("ERROR: " + errorMsg);
 };
 if (userInput < 0) {
-  // ______("Invalid input");
+   logger("Invalid input");
 }
 
 // Fill in the blank in line 7 (then uncomment it) so that it logs an error message if userInput is negative.

more-on-functions/chapter-examples/make-function-call-itself/decreasingSum.js

@@ -3,6 +3,7 @@ function decreasingSum(integer) {
       return integer;
    } else {
       //call decreasingSum function again
+      return integer + (decreasingSum(integer-1));
    }
 }
 

more-on-functions/exercises/practice-your-skills.js

@@ -1,5 +1,16 @@
 //Create an anonymous function and set it equal to a variable.
+let practice = function(myArg) {
+    if (typeof myArg === "number") {
+       return myArg * 3;
+    } else if (typeof myArg === "string"){
+        return "ARRR!";
+    } else {
+        return myArg;
+    }
 
+ }
+
+console.log(practice(5));
 /* Your function should:
 a) If passed a number, return the tripled value.
 b) If passed a string, return the string “ARRR!”

more-on-functions/exercises/raid-a-shuttle.js

@@ -24,19 +24,23 @@ let cargoHold = ['meal kits', 'space suits', 'first-aid kit', 'satellite', 'gold
 console.log("Fuel level: " + checkFuel(fuelLevel));
 console.log("Hold status: " + holdStatus(cargoHold));
 
-/* Steal some fuel from the shuttle:
- * /
- 
-//a). Define an anonymous function and set it equal to a variable with a normal, non-suspicious name. The function takes one parameter. This will be the fuel level on the shuttle.
 
-//b). You must siphon off fuel without alerting the TAs. Inside your function, you want to reduce the fuel level as much as possible WITHOUT changing the color returned by the checkFuel function.
+let nonSuspiciousFunction = function(a) {
+  if (checkFuel(a) === 'green') {
+     return a - 100001;
+  }
+  else if (checkFuel(a) === 'yellow') {
+     return a - 50001;
+  }
+  else {
+     return a;
+  }
+}
+
+console.log(nonSuspiciousFunction(3));
 
-//c). Once you figure out how much fuel to pump out, return that value.
 
-//d). Decide where to best place your function call to gather our new fuel.
 
-/* Next, liberate some of that glorious cargo.
- * /
 
 //a). Define another anonymous function with an array as a parameter, and set it equal to another innocent variable.
 
@@ -46,8 +50,7 @@ console.log("Hold status: " + holdStatus(cargoHold));
 
 //d). Don’t get hasty, matey! Remember to test your function.
 
-/* Finally, you need to print a receipt for the accountant. Don’t laugh! That genius knows MATH and saves us more gold than you can imagine.
- * /
+
 
 //a). Define a function called irs that can take fuelLevel and cargoHold as arguments.